Combination wall board and lath



Sept. 2 1924 1,506,931

W. D. HICKS COMBINATION VIA LL BOARD AND LATH Filed Dec. 31 1921 Patented Sept. 2, 1924.

UNITED STATES PATENT OFFICE.

WILIiIAM- D. HICKS, OF INGLEWO'OD, CALIFORNIA.

COMBINATION WALL BOARD AND LATE.

Application filed December 31, 1921. Serial No. 526,176;

ticularly pertains to improvements in the lath board shown in United States Letters Patent No. 1,406,188, issued to me on February 14, 1922. An'object of --the invention is to provide a composition board which may be employed in covering walls and surfaces, either to give a finished surface or to provide a lath to of plaster or the like.

Another object is to provide a composition board, one side of which is formedwith recesses to form lath and the opposite side of which is smooth and adapted to serve as a finished surface.

Another object is to provide a composition board embodying a plastic body covered on its opposite sides by facing sheets of paper or the like in which. recesses are formed in the plastic body adapted to receive plaster and form a key in which opposite side walls of the recesses are covered by facing flaps to prevent too rapid absorption of moisture from the plaster by the plastic body. I

A further object is to provide 'a composition wall board .and lath having plaster receiving recesses which is so constructed as not to be materially weakened because of such recesses, thereby providing a .board that may be subjected to rough handling with little danger of breakage.

With the foregoing objects in view, together with such other objects as may subsequently appear, my invention consists of the parts and the construction, arrangement and combination of parts or their equivalents as hereinafter described and claimed and illustrated in the accompanying drawin in which ig. 1 is a plan view of the board, showing it as applied when employed as alath.

ig.- 2 is a view of the board showing it as applied when employed in finishing a surface.

Fig. 3 is an enlarged detail section as seen on the line 3-'-3 of Fig. 1, being a View in receive a coating section longitudinally thru one of the plaster receiving recesses.

Fig. 4 is a detail in cross sectionas seen on the line H of Fig. 3. Fig. 5 is a detail in perspective illustrating the manner of forming a facing sheet with slits, showing in dotted lines how portions of the sheet on opposite sidesof the slits are bent out to form flaps. v I Fig.6 is adetail in perspective illustrating a portion of the board as seen in section thru one of the plastic receiving recesses.

Fig. 7 is a detail in section showing a modified form of the board.

More specifically 8 indicates the board which embodies a slab of hardened plastic material 9 formed with a plurality of apertures extending therethru which apertures are of elongated rectangular form and are preferably arranged in rows with the apertures in adjacent rows staggered in relation to each other. The side and end walls 10 and 5-11 respectively ofthe apertures are inclined so as to form the apertures with transverse and longitudinal cross sections of dove-tail form.

Covering one side of the plastic slab is a facing sheet 12 having rectangular openings 13 the margins of which terminate substantially at the margins of the apertures in the slab 9 so as not to project into the apertures although the'margins of the open ings 13 may extend slightly beyond the margins of the apertures. Carried on the other side of the slab is a facing sheet 14 formed with a series of openings 15 having flaps 16 and 17 on its opposite sides which flaps are turned as indicated in dotted lines on Fig. 5 toextend over the inclined side walls 10 in the apertures in the slab; the flaps 10 extending into the apertures from the'widest portion thereof and terminating at or adjacent the margins of the openings 13 in the facing sheet 12'.

Mounted on the side of the board covered by the facing sheet 14 is a backing sheet 18 which extends overthe openings 15 in the facing sheet and serves to convert the apertures formed in the slab into recesses or channels. The backing sheet 18 serves to reinforce the board and also to provlde a smooth unbroken or imperforate surface on one side thereof so that the board may be employed to form a finished wall or surface. The board 8 is preferably rectangular and is formed so that its margins will extend approximately centrally thru the recesses in such a manner that when a pair of the boards are placed end to end recesses will be formed across the joint and in like manner when a pair of boards are placed side by side either in alignment or offset relative to each other a row of recesses will be formedalong the joints. By this arrangement on applying plaster to the recessed side of the panels adjacent panels will be keyed together along their joints by plaster keys.

The operation of the invention is apparent from the foregoing, it being seen that on applying plaster to the recessed side of the board, plaster entering the recesses will have keyed connection therewith.

-An important feature of the invention resides in lining the side walls of the recesses with the flaps 16 and 17 so as to prevent rapid absorption of moisture from the plaster by the plastic slab which would .occur were the walls of the apertures in the slab uncovered. The end of the apertures in the slab, however, are preferably left un- I covered so as to effect suction at the ends of sor the plaster keys on initial application of the plaster, thus serving to insure adherence of the plaster to the board.

The facing sheets 12 and 14 are referabl water-proof so as not to readily abmoisture.

In some instances, where it is not desired to employ the backing sheet 18 the latter may be dispensed with, thereby forming the board with apertures 15 extending therethru as shown in Fig. 7 and thus providing a board adapted solely for use as a lath.

I claim as my invention: p

1. .In a composition wall board and lath, a body of hardened plastic material 'provided with a plurality of apertures that are dove tail shape in cross section, facing sheets applied to the opposite sides of said body, one of said sheets having portions that are bent inwardly against the side faces of the dove tailed apertures, the other of said facing sheets being formed with openings the margins of which terminate at the margins of said apertures and a backing sheet applied to one of said facing sheets and covering said dove tailed a ertures.

2. A composition lat -board comprising a slab of hardened plastic material formed with a plurality of apertures therethru, the

apertures having their side walls inclined, a

and a facing sheet extending over the other side of the slab formed with openings registering with the apertures, said openings being provided with side flaps, said flaps extending over the inclined sides of the aper tures and terminating adjacent the margins of the openings of the other facing sheet.

3. A composition lath-board comprising a slab of hardened plastic material formed witha plurality of apertures therethru, the apertures having their side walls inclined, a facing sheet extending over one side of said slab having openings the margins of which terminate at the margins of the apertures, and a facing sheet extending over the other side of the slab formed with openings registering with the apertures, said openings being provided with side flaps, said flaps extending over the inclined sides of the apertures and terminating adjacent the margins of the openings of the other facing sheet and .an imperforate backing sheet extending over said last named facing sheet and closing the apertures.

4. A composition lath board comprising a slab of hardened plastic material formed with a plurality of apertures therethrough, a facing sheet extending over one side of said slab having openings the margins of which terminate at the margins of the apertures, and a facing sheet extending over the other side of the slab formed with openings registering with the apertures, said openings being provided with side flaps extending over the sides of the apertures and terminating adjacent the margins of the openings of the other facing sheet.

5. A composition lath board comprising a slab of hardened plastic material formed with a plurality of apertures therethrough, a facing sheet extending over one side of said slab having openings the margins of which terminate at the margins of the apertures, a facing sheet extending over the other side of the slab formed with openings registering with-the apertures, said openings being provided with side flaps extending over the sides of the a ertures and terminating adjacent the margins of the openings of the other facing sheet, and an im erforate backv ing sheet extending over the ast named fac- 

